Optical plethsymograph has an assembly for transmitting light through patient skin and capture of back scattered light, whereby the light outlet and inlet light surfaces surround each other by at least half the surface solid angle

摘要

Sensor for optical measurement of the blood flow through the skin has an assembly for transmission of light through a sensor light outlet surface, through the patient skin and back to a receiver for detection of back-scattered light. Either the light outlet surface or the light inlet surface surrounds the other with an overlap area of at least half the surface solid angle.